Get back to your file management program.
Go to your main hard drive root directory Create a new subdirectory from the root called MYTEMP. (If there's already a MYTEMP, call yours something else. It doesn't matter what.)
You may have to look on menus for the command to create a new directory. Explore! Be bold!
Copy your file from your disk to the new directory. There are a number of ways to do this. Compare your method with what your classmates discover.
Delete your subdirectory. Note that you have to delete your file first. It's OK. You still have a copy on your floppy disk.